Muhammed Seid. 2020. “Comorbid Substance Used Disorders and Associated Factors Among People With Mental Illness: A Facility Based Cross Sectional Study from Northeast Ethiopia: A Preliminary Study for a Harm Reduction Strategies”. International Journal of Allied Medical Sciences and Clinical Research 7 (4):1224-34. https://doi.org/10.61096/ijamscr.v7.iss4.2019.1224-1234.